160m - 6m Medium Power HF/VHF 9:1 Balun

TZ-230T-4H 9:1 Medium-Power Balun


The TZ-230T-9M Balun features include:

  • Operating frequency - 1.8 MHz to 60 MHz (usable to 1.8 -> 90 MHz)
  • Operating power - 300W CW continuous (into a matched load), 600W PEP
  • Type - Triple Toroidal ferrite core
  • Ratio - 9 :1 (450ohm : 50 ohm step down)
  • Typical impedance - 450 ohm (600 -> 75 ohm with reduced performance)
  • Thru loss - < 0.10dB (typical 1.8 to 30 MHz) (Better than 0.05dB midband, better than 0.15dB on 6m)
  • VSWR - Degradation less than 1.1:1 (typical)

PRICE:   $75.00

TZ-230D-4m shown, packaging and sizing is identical. Internal components are particular to each balun type.


The TZ-230T-9M balun is a high performance low loss, 9:1 current mode balun. The balun is supplied with all stainless steel connections, fully sealed in a high impact ABS plastic case and is suitable for boom mounting or sling mounting. Three toroidal ferrite cores are used to extend the useable range of the balun down to 160m and all the way above 60MHz, whilst still being able to handle medium power levels, without saturating. Yes, the balun can be used on 6m too. Larger diameter wire is used in the winding for additional currents in the windings.


The TZ-230T-9M is designed to be able to be used in either wire antenna or boom antenna installations. An eyelet is provided to support the balun when it is hung in a vertical situation such as when installed in an Off Centre Fed wire dipole, windom or rhombic antenna. Groves in the base of the balun enclosure are provided to assist mounting of the balun to a round tube such as a mast for a log periodic antenna or HB9CV. Large cable ties can be used for the boom installation and small cable ties for the wire installations.


The TZ-230T-9M is not a kit. This is a triple toroidal core, current mode (Guanella) balun. It is supplied fully constructed with detailed installation instructions and hardware for mounting. The TZ-230T-9M is an excellent choice for Off Centre Fed dipole, random length wires, Rhombics, terminated Vee Beams, Log Periodics, horizontal loops and other high impedance antennas. The balun can also be used to end feed a vertical or horizontal wire of random length with a feedpoint located ATU for an effective all band antenna.

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